Elastomeric cellular products obtained from alkyd resin-diisocyanate mixture



l l r. i i

ELASTOMERIC CELLULAR PRQDUCTS ()BTAINED FROM ALKYD RESIN-DIISOQYANATE MIXTURE No Drawing. Application May 11, 1953, Serial No. 354,380

19 Claims. (Cl. zen-2.5

This invention relates to foamed or cellular materials and relates more particularly to cellular plastic or resin products that are flexible and elastic.

In general, the cellular plastics heretofore prepared by reacting a polyester resin, an isocyanate and a catalyst with or without modifiers and additives, are rigid, unyielding and inelastic. Such products are finding considerable application in the various industries because they may be readily produced by simply mixing together the several ingredients and then pouring the resultant reactant mixture into the mold, cavity, or the like, to foam up and form the cellular, low-density high-strength mass at atmospheric pressure and room temperature. However, the range or field of usefulness of these materials has been limited to some extent due to their characteristic rigidity and inelasticity. We have discovered that this general type of cellular plastic product may be made flexible and elastic by incorporating a combination of reactive and inert plasticizers in the reactant mixtures or compositions. It is, therefore, an object of this invention to provide expanded or cellular resin products that are yielding, resilient and elastic and, therefore, suitable for uses or applications for which the other rigid and unyielding foamed plastics of this class are not suited.

It is another object of the invention to provide cellular or expanded resin products that may be varied or differentiated in their physical characteristics so that some are extremely soft, resembling foamed latex rubber, others are soft leather-like products, and others may be more resistant to deformation. All of the products of the invention are characterized to a greater or lesser extent by the ability to flow or deform under load and to slowly return to their original shape and dimensions when relieved of the load. The materials or products of the invention act differently than putty and like materials which flow plastically under load but which do not return completely when the deforming load is removed and act differently than true elastomers, such as rubber, which return rapidly and elastically to their original shape and dimensions when the deforming load is removed. The cellular products of this invention While being capable of ready deformation under load return quite slowly, upon the removal of the deforming load, to their original shape and dimensions. This special or peculiar characteristic of the materials Well adapts them for use in situations where the true elastomers are not suitable because of their rapid spring-back or elastic return.

Another object of the invention is to provide foaming reactant compositions and their cellular reaction products characterized by the use or inclusion of reactive and inert (so far as reaction with the isocyanate component is concerned) plasticizers employed either as a blend or as individual components. We discovered that by incorporating the reactant and inert plasticizers in the reactant polyester-isocyanate mixture that the cellular or foamed reaction products have the elastomeric-slow return char acteristics above referred to. The results of thus includ- 'ing both reactive and inert plasticizers in the polyesterastett 2,811,493 Patented Oct. 2%, 1957 isocyanate mixtures are unexpected since the quasi elastomeric cellular reaction products have little or no similarity to the materials produced by merely plasticizing a polyester-isocyanate foaming mixture.

We have found that the two plasticizers, that is the reactive and the inert plasticizers, may be mixed with or in the polyester-isocyanate mixture at the time the same is to be poured or molded or the two plasticizers may be premixed with the resin component to obtain a single intermediate that may be more convenient for use.

A further object of the invention is to provide foamed or expanded deformable and elastic plastic products of the kind described that are especially well suited for eastings or moldings of the foamed-in-place type and that are easily removable from the mold or die. The products are durable and have excellent surface finish.

Other objectives and advantages of the invention will become apparent from the following description which includes several examples or formulations that are intended primarily to be illustrative and typical and not restrictive in nature.

The components of the formulations or reactant mixtures for producing the expanded or cellular products include one or more polyester resins, reactive plasticizer, an inert plasticizer and an isocyanate. In addition the reactant compositions may include one or more fillers, a wetting agent and one or more pigments.

The polyester resin or resins may be selectedfrom several types or classes. It is preferred to employ polyester resins having an acid number of from 10 to and having a functionality ratio of from 3 to 1 /2 OH groups to 1 COOH group and a water content of from 0.2 to 5% by weight. Typical of the saturated polyester resins that are useful are the following Resins A, B and C.

In resins such as the Resins A, B and C, all or part of the trimethylol propane may be replaced by triethanol propane or trimethylol ethane. Excellent results have been obtained where Resin Ahas been incorporated in the reactant resin-isocyanate mixture or composition. An example of an unsaturated polyester resin that has been found to be practical and effective in the formulations of the invention is prepared from:

RESIN D V Mols Tri-isopropenol (l) propane 4 Adipic acid 2 /2 Phthalic anhydride /2 Various combinations of diols and triols may be used in preparing the polyester resins where the OH functionality of the same contributed by the triol constitutes a minimum of 50% of the total 0H functionality. The following Resin E is an example of such a resin. I

the ethylcellulose resins which we employ is between? and 200 centipoises and preferably 100 centipoises, the viscosity being determined on the basis of a by weight solution in a 60:40 toluene-ethanol solvent at 25 C.

Additives that we have found advantageous in obtaining uniformity of cell size of the cellular products, to aid in controlling the reaction of the mixtures and to obtain desirable release of the cellular products from their molds are metallic soaps. Divalent and trivalent metallic soap powders useful in the reactant compositions or mixtures are metallic soap powders of fatty acids having from 12 to 20 carbon atoms such as:

Zinc stearate Aluminum stearate Calcium stearate Magnesium stearate Magnesium hydroxy stearate Barium stearate Zinc laurate Calcium oleate Strontium stearate These additives may be employed individually or in blends or combinations. We have found the aluminum and zinc stearates to be particularly elfective for the purposes above mentioned. The metallic soap powder additive or filler component is preferably used in the reactant mixtures in the proportion of about 4.5 parts by weight to 100 parts by weight polyester resin but the proportion of the soap powders may range from a fraction of 1 part to 15 parts to 100 parts by weight of polyester resin. The soap powders may be omitted from the reactant foaming compositions if desired.

We prefer to incorporate one or more wetting agents in the foaming reactant compositions to promote uniform rise of the foam, to assist in obtaining the desired cell structure and uniformity of cell size in the expanded plastic products. It has been found most desirable to use as the wetting agents the mixed alkyl-sodium, potassium, magnesium or ammonium soaps of the phosphoric acids represented by the following type formulae:

Type Formula 1 (HPO3)n where n=2, 3, 4 or 6 Type Formula 2 MxRy(PsOio) n, where n: l, 2 or 3 Type Formula 3 MxRyPO4 In these formulae M=Na, K, Mg or MH4, and R=methyl through dodecyl alkyl groups saturated or unsaturated, substituted or unsubstituted by halide, amino, keto or other groups.

The acids of type Formula 1 include:

(HPOa)6=hexameta phosphoric acid (HPO3)4=tetrameta phosphoric acid (HPO3)3=trimeta phosphoric acid (HPO3)2=dimeta phosphoric acid The acids of type Formula 2 include:

(H5P3010) n, where n=l, 2 or 3=tripoly phosphoric acid The acids of type Formula 3 include:

HaPO4=0rth0 phosphoric acid in the foaming mixtures; to obtain either or both improved strength characteristics and color requirements of the products. Standard or typical commercial carbon blacks of the type used in inks are suitable but where the color black is desired we prefer to use a colloidal carbon black combining an ultra channel black and a suitable wetting agent. Other pigments that are useful in the foaming plastic material mixtures include silica, titanium dioxide, lead oxides, other insoluble metal oxides and metallic leafing powders. The pigment or pigments are used in the foaming mixtures in the proportion of from a fraction of lpart by, weight to 10 parts by weight and usually in the amount of about 2 parts by weight for each parts by weight of polyester resin.

In preparing the reactant mixtures we have found that the reactive and inactive plasticizers may conveniently be mixed with the resin and the wetting agent, fillers and pigments, when the latter are used, to constitute a single component or package which may later be mixed with the isocyanate component toproduce the foaming reactant composition. However, if desired, the plasticizers, the resin, thewetting agent, fillers, etc., may be individually mixed with the isocyanate component when the product is to be-produced. The isocyanate component when incorporating the ethyl cellulose or other high molecular weight additives is prepared or pre-mixed by dissolving the additive in the isocyanate either'at room temperature or up to approximately 225 F. 'The foaming mixture when prepared as above described is merely poured into the mold or cavity or otherwise applied to react and foam up at atmospheric pressure and at room temperature. The resultant cellular plastic product is preferably heat cured at from to 250 F. for from 1 to 2 hours. The elasticity and flexibility of the products may be varied at will by varying the relative proportions and types of the plasticizers, and the isocyanate. For example the product obtained from the following formulation of Example I is more yielding and elastic than the product produced from Example II. The followingv are typical illustrative examples of the formulations for preparing the expanded or cellular plastic pro ducing foaming mixtures and of course are subject to considerable variation to obtain cellular products differing considerably in their physical characteristics. The ingredients or components in the following examples are in approximate parts by Weight.

EXAMPLE I Parts Resin A-H2O content 1 /2%acid number 1050 45 Polypropylene glycol'-average molecular weight 400;. 30

Aluminum stearate 2 Carbon black /2 Cyclohexyl levulinate 5 Meta-toluene diisocyanate, containing 6 parts ethyl cellulose per 100 parts of the meta-toluene diisocyanate 22 Wetting agent 1 In this and the following examples, unless otherwise specified, the ethyl cellulose may have a viscosity of from 50 to 200 centipoises, and preferably 100 centipoises, and an ethoxyl content of from 45 to 49.5% and the wetting agent may be sodium 2, ethylhexyl derivatives of tripoly phosphoric acid.

EXAMPLE II Parts Resin A having an acid number of 10-50, and an H2O content of 1 /2% 45 Aluminum stearate 2 Polypropylene glycol-average molecular weight 400-- 30 Carbon black /2 Methyl 'abie 5 Meta-toluene diisocyanate, containing 6 parts ethyl cellulose per 100 parts of the meta-toluene diisocyanate Wetting agent i '1.

EXAMPLE m Meta-toluene diisocyanate containingti'parts ethyl celluose for each 100 parts meta-toluene diisocyanate 22 EXAMPLE IV Parts Resin A7l.5% Hgomacid number 10-50 45 Polypropylene glycolwaverage molecular weight 40d. 30 Aluminum stear t H p a w 2 Carb n' k V1 Cyclohexyl'levu 5 Meta-toluene diisocyan-ate containing 6 parts ethyl cellulose for each 100 parts meta-toluene diisocyanat f 25 Wetting age i 1 EXAMPLE v a Parts Resin A having an acid number of -50, and an H2O content of l /z% 45 Polypropylene glycolaverage molecular weight 40D. 30

Aluminum stearate r 2 Carbon black 7 7 V2 Methyl abietate 5 The foregoing Examples I to V inclusive illustrate the effect of varying the primary components that is the polyester resin, the reactive and inactive plasticizers and the isocyanate components, the other components, that is the fillers, pigment and wetting agent may or may not be maintained the same in such formulations. Example I is productive ofa soft yieldable foam or cellular material whereas the product of Example II is somewhat harder than that produced by the formulation of Example I by reason of the change in the plasticizer component. Again, Example III illustrates the effect of employing different plasticizer components and is productive of a cellular material harder than that obtained from the formulation of Example I. Example IV illustrates the effect of altering the isocyanate componentand is productive of a cellular plastic material harder than that obtainable from Example I. Example V also illustrates the eflect of modifiying the isocyanate component and results in a cellular product somewhat softer than the product obtained from Example II. It is to be understood that in. these examples zinc stearate, magnesium stearate and the other divalent and trivalent metallic soap powders enumerated above may be substituted for the aluminum steara-te and instead of employing the carbon black aluminum leafing powder. or mixtures of metallic leafingpowders and carbon black or dyes may be employed. The following Examples VI and IX are further illustrative of typical formulations of the invention:

EXAMPLE VI Parts Resin AH2O content l%+acid number l0-.-.50 45 Polypropylene glycol-average molecular weight Meta-toluene diisocyanate containing dparts ethyl; cellulose having'a viscosity of centipoises per '100 parts meta-toluene diisocyanate Meta-toluene diisocyanate containing 2" partsethyl cellulose having a viscosity of 200 centipoises for each 100 parts meta-toluene diisocyanate l0 Wetting agent 1 EXAMPLE VII Resin C-HzO content 2%-acid number Z5.@.-.r-.---.-,--.- 45 yp opy glycol-average m ecular wei h 2.5--( 5 Polypropylene glycolaverage molecular weight (EDG -1Q; Zinc stearate 2 Cyclohexyl levulinate 5 Meta-toluene diisocyanate 5 Meta-toluene diisocyanate containing 6' parts ethyl cellulose having a viscosity of from 25 to 200 centipoises for each 100 parts meta-toluene diisocya- EXAMPLE VIII Parts Resin A-HzO content 1.5 %-acid number 20 45 Polypropylene glyco1average molecular weight M t y etate Meta-toluene diisocyanate containing 2 parts ethyl cellulose having a viscosity of 200 centipoises and an ethoxyl content of 45 for each: 100 parts metatoluene. diisocyanate r -m 22 EXAMPLE IX 7 Parts Resin E-HzO content 3% -.-acid number 10-50 45 The formulations or compositions of the invention are particularly well suited for producing castings or moldings of the foamed-in-place type. The cast or molded products have been found to be extremely durable and have good surface finishes. The moldings or castings are readily removed from the cavities or dies and have been found to have uniform cell structureand physical strength characteristics throughout the individual products or castings.

It should be understood that the invention is not intendedto be based upon or dependent upon the theories we have expressed. Nor is the invention to be regarded as limited to the express procedure or materials set forth, these details being given only by way of illustration and to aid in clarifying the invention. We do not regard suchspecific details as essential to the invention except insofar as they are expressed by way of; limitation in the following claims in which his, our intention to claim all novelty inherent in the invention as broadly as is permissible in view of the prior art.

We claim:

1. The. yielding resilient cellular material which is the product of reaction of a foaming composition comprising on an approximate part by weight basis 100 parts of an alkyd resin having anacid number of from 10 to 50 and having a functionality ratio of from 3 to 1 /2 OH groups to 1 COOH group,'from 20' to parts of a polyglycol reactive plasticizer having an average molecular weight of from 200 to 2000 selected from the group consisting of polyethylene glycol and polypropylene glycol; from 2- to 20, parts of an inactive ester plasticizer selected from the group consisting of cyclohexyl. levulinate, methyl abietate, dihydromethyl' abietate,'dioet-yl suecinate, di (2- ethyl hexyl)z adipate, (lihutyl phthalate; tri-(Q-ethyl hexyl) phosphate, triethylene glycol di (2 -e.thyl.bu tyrate), -triethylene glycol di (2-ethyl hexoate) and di (n-hexyl phthalate),. and from 30 to 100 parts meta-toluenedi: isocyanate containing from a fraction of one part to 15 parts of a high molecular Weight thermoplastic resin additive soluble in the meta toluene diisocyanate and selected from the group consisting of ethyl cellulose, chlorinated rubber, benzyl cellulose, natural rubber, vinyl chloride-vinyl acetate copolymers, polyvinyl chloride, polyvinyl acetate, polystyrene and polydichlorostyrene.

2. The yielding resilient cellular material which is the product of reaction of a foaming composition comprising on an approximate part by weight basis, 100 parts of an alkyd resin having an acid number of from 10 to 50 and having a functionality ratio of from 3 to 1 OH groups to 1 COOH group, from 20 to 130 parts of a polyglycol active plasticizer having an average molecular weight of from 200 to 2000 selected from the group consisting of polyethylene glycol and polypropylene glycol, from 2 to 20 parts of an inactive'ester plasticizer selected from the group consisting of cyclohexyl levulinate, methyl abietate, dihydromethyl abietate, dioctyl succinate, di (2- ethyl hexyl) adipate, dibutyl phthalate, tri (2-ethyl hexyl) phosphate, tri-ethylene glycol di (2-ethyl butyrate), triethylene glycol di (2-ethyl hexoate) and di (n-hexyl phthalate), from a fraction of one part to 15 parts of a metallic soap powder of a fatty acid having from 12 to 20 carbon atoms, and from 30 to 100 parts of metatoluene diisocyanate containing from 'a fraction of one part to 15 parts per 100 parts of the diisocyanate'of ethyl cellulose having a viscosity of from 7 to 200 centipoises and an ethoxyl content of from 43 to 5 3. The yielding resilient cellular material which is the product of reaction of a foaming composition comprising on an approximate part by weight basis 100 parts of an alkyd resin having an acid number of from 10 to 50 and having a functionality ratio of from 3 to 1 /2 OH groups to 1 COOH group, from 20 to 130 parts of a polyglycol active plasticizer having an average molecular weight of from 200 to 2000 selected from the group consisting of polyethylene glycol and polypropylene glycol, from 2 to 20 parts of an inactive ester plasticizer selected from the group consisting of cyclohexyl levulinate, methyl abietate, dihydromethyl abietate, dioctyl succinate, di-(2- ethyl hexyl) adipate, dibutyl phthalate, tri(2ethyl hexyl) phosphate, tri-ethylene glycol di(Z-ethyl butyrate), triethylene glycol di(Z-ethyl hexoate) and di(n-hexyl phthalate, from a fraction of one part to 15 parts of a metallic soap powder of a fatty acid having from 12 to 20 carbon atoms, from a fraction of one part to 10 parts of a wetting agent selected from the group consisting of the mixed alkyl-sodium, potassium, magnesium and ammonium soaps of phosphoric acids which phosphoric acids have the type formulae:

(HPO3)n, where n=6, 4, 3 or 2, (H5P3010) n, where n=1, 2 and 3, H3PO4,

where the alkyl groups are from methyl through dodecyl, from a fraction of one part to parts pigment, and from 30 to 100 parts of meta-toluene diisocyanate containing from a fraction of one part to parts of a high molecular weight thermoplastic resin additive soluble in the meta toluene diisocyanate and selected from the group consisting of ethyl cellulose, chlorinated rubber, benzyl cellulose, natural rubber, vinyl chloride-vinyl acetate copolymers, polyvinyl chloride, polyvinyl acetate, polystyrene and polydichlorostyrene.

4. The yielding resilient cellular material which is the product of reaction of a foaming composition comprising on an approximate part by weight basis 100 parts of an alkyd resin having an acid number of from 10 to 50 and having a functionality ratio of from 3 to 1 /2 OH groups to 1 COOH group, from 20 to 130 parts of a polyglycol reactive plasticizer having an average molecular weight offrom-200 to 2000lselected from :thegroup consisting of polyethylene glycol and polypropylene glycol, from 2 to 20 parts of an inactive ester plasticizer selected from the group consisting of cyclohexyl levulinate, methyl abietate, dihydromethyl abietate, dioctyl succinate di-(2- ethyl hexyl) adipate, dibutyl Phthalate, t1i(2-ethyl hexyl) phosphate, tri-ethylene glycol di(Z-ethyl butyrate), triethylene glycol di(2-ethyl hexoate) and di(n-hexyl phthalate, 30 to parts of meta-toluene diisocyanate containing from 0.03 to 15 parts ethyl cellulose per 100 parts of the meta-toluene diisocyanate, and ethyl cellulose having a viscosity of from 7 to 200 centipoises and an ethoxyl content of from 43 to 50%. I

5. vThe yielding resilient cellular material which is the product of reaction of a foaming composition comprising on an approximate part by weight basis, 100 parts of an alykd resin having an acid number of from 10 to 50 and having a functionality ratio of from 3 to 1% OH groups to 1 COOH group, from 20 to parts of a polyglycol active plasticizer having an average molecular weight of from 200 to 2000 selected from the group consisting of polyethylene glycol and polypropylene glycol, from 2 to 20 parts, of an inactive ester plasticizer selected from the group consisting of cyclohexyl levulinate, methyl abietate, dihydromethyl abietate, dioctyl succinate, di-(Z-ethyl hexyl) adipate, dibutyl phthalate, tri(2-ethyl hexyl) phosphate, tri-ethylene glycol di(Z-ethyl butyrate), tri-ethylene glycol di(Z-ethyl hexoate) and di(n-hexyl phthalate), from a fraction of one part to 15 parts of a metallic soap powder of a fatty acid having from 12 to 20 carbon atoms, from 30 to 100 parts of meta-toluene diisocyanate containing from 0.03 to 15 parts ethyl cellulose for each 100 parts of the meta-toluene diisocyanate, the ethyl cellulose having a viscosity of from7 to 200 centipoises and an ethoxyl content of from 43 to 50%.

6. The yielding resilient cellular material, which is the product of reaction of a foaming composition comprising on an approximate part by weight basis 100 parts of an alkyd resin having an acid number of from 10 to 50 and having a functionality ratio of from 3 to 1 /2 OH groups to 1 COOH group, from 20 to 130 parts of a polyglycol active plasticizer having an average molecular weight of from 200 to 2000 selected from the group consisting of polyethylene glycol and polypropylene glycol, from 2 to 20 parts of an inactive ester plasticizer selected from the group consisting of cyclohexyl levulinate, methyl abietate, dihydromethyl abietate, dioctyl succinate, di-(2- ethyl hexyl) adipate, dibutyl phthalate, tri(2-ethyl hexyl) phophate, tri-ethylene glycol di(Z-ethyl butyrate), triethylene glycol di(Z-ethyl hexoate) and di(n-hexyl phthalate), from a fraction of one part to 15 parts of a metallic soap powder of a fatty acid having from 12 to 20 carbon atoms, from a fraction of one part to 10 parts of a wetting agent selected from the group consisting of the mixed alkyl ester soaps of phosphoric acids which phosphoric acids have the type formulae:

(HPO3)n, where n=6, 4, 3 and 2, a (H5P3O10)n, where 21:1, 2 and 3, H3PO4,

Where the alkyl groups are from methyl through dodecyl and the positive portion of thesoap is selected from the group consisting of sodium, potassium and ammonium, from a fraction of one part to 10 parts pigment, from 30 to 100 parts of meta-toluene diisocyanate containing from 0.03 to 15 parts ethyl cellulose for each 100 parts of the meta-toluene diisocyanate, the ethyl cellulose having a viscosity of from 7 to 200 centipoises and an ethoxyl content of from 43 to 50% 7. The yielding resilient cellular material which is the product of reaction of a foaming composition comprising on an approximate part by weight basis 100 partsof an alkyd resin having an acid number of from 10 to 50 and having a functionality ratio of from 3 to 1 /2 OH 7 groups to 1 COOHgroup, from 20 to 130 partspoly;

gauges "ethylene" glycol having a molecular weight of"from"200 to 20.60,; fromZbcZO parts of an. inactive ester-plastilcizerfselect'ed from the {group consistilng'o'f cyclohxy'l 'l'evul'inate, methyl abietate, 'di-hydrome'thyli abie'tat'e, dioctyl succinate; di-(Z-ethyl hexyl I adipate, dibu'tyl' patlialate, 'tri(2-ethyl he'xyl.) phosphate, wti-i-ethylen'e glycoli di '(eth'yl butyrate) 'tri-ethylene glycol difZ-ethyl hexoate and di'(n-hexyl phthalate, and from 30 to IOOQparts of meta-toluene diisocyanate containing from 0.03 to I parts. ethyl cellulose for each- 100 parts of the meta-toluene diisocyan'at'e'; the ethyl cell'ulo'sfe having a viscosity of from 7 to 200 centipoises and an ethoxyl content of from 43to50.%. '1 V flf 78'. The yieldingfresilient cellular material which is the product of reaction of a foaming composition comprising onan approximatepart by weight'basis T00 parts .of'an alkygljresin' having an acid number of from I0 tol50 and haying ai unctionality ratio of from 3 to 1 OH groups to '1' COOH group, from -20 to l30p'arts polypropylene glycol having a molecular weight of from 2,00 to 2.000, from 2' to 20 parts of an inactive ester plasticizers'elected from the group consisting of cyclohexyl levulin'ate, methyl abietate, dihydromethyl abietate, dioctyl succinate, di- (Z-ethyl hexyl) adipate, dibutyl phthalate, tri(2-ethyl hexyl) phosphate, tri-ethylene glycol di(2-ethyl butyrate), triethylene glycol di(2-ethyl hexoate) and di(n-hexyl phthalate), and from 30 to 100 parts of meta-toluene diisocyanate containing from 0.03 to 15 parts ethyl cellulose for each 100 parts of the meta-toluene diisocyanate, the ethyl cellulose having a viscosity of from 7 to 200 centipoises and an ethoxyl content of from 43 to 50%.

9. The yielding resilient cellular material which is the product of reaction of a foaming composition comprising on an approximate part by weight basis 100 parts of an alkyd resin having an acid number of from to 50 and having a functionality ratio of from 3 to 1 /2 OH groups to 1 COOH group, from 20 to 130 parts of a plasticizer having an average molecular weight of from 200 to 2000 selected from the group consisting of polyethylene glycol and polypropylene glycol, from 2 to 20 parts of an ester plasticizer selected from the group consisting of cyclohexyl levulinate, methyl abietate, dihydromethyl abietate, dioctyl succinate, di-(Z-ethyl hexyl) adipate, dibutyl phthalate, tri(2-ethyl hexyl) phosphate, tri-ethylene glycol di(2-ethyl butyrate), tri-ethylene glycol di(2-ethyl hexoate) and di(n-hexyl phthalate, and from '30 to. 100 parts of meta-toluene diisocyanate containing fi'om 0.03 to .15 parts ethyl cellulose for each '100 parts of the meta-toluene diisocyanate, the ethyl cellulose having a viscosity of from 7 to. 200 centipoises and an ethoxyl content of from 43 to 50%.

10. The yielding resilient cellular material, which is the product of reaction of a foaming composition comprising on an approximate'part by weight basis 100 parts of an alkyd resin having an acid number of from 10 to 50 and having a functionality ratio of'from 3 to 1 /2 OH groups to 1 COOH group from20' to 130 parts of a polyglycol reactive'plasticizer having an average molecular weight of from 200 to 2000 selected from the group consisting of polyethylene glycol and polypropylene glycol, from 2 to 20 parts of an inactive ester plasticizer selected from the group consisting of cyclohexyl levulinate, methyl abietate, dihydromethyl abi'etate, dioctyl succinate, di- (2-ethyl hexyl) adipate, 'dibutyl, phthalate, tri(2-ethyl hexyl) phosphate, tri-ethylene glycol di(2,-ethyl butyrate), tri ethylene glycol di(2-ethyl hexoate) and di(n-hexyl 'phthalate) and from 30 to 100 parts of an isocyanate component comprising meta-toluene diisocyanate and from a fraction of one part to parts of a high molecular weight thermoplastic resin soluble in the meta-toluene diisocyanate selected from the group consisting of ethyl cellulose, chlorinated rubber, benzyl cellulose, natural rubber, vinyl chloride-vinyl acetate copolymers, polyvinyl chloride, polyvinyl acetate, polystyrene, and poly dichloro styrene.

111. The resilient cellular reaction product of a foamling composition comprising on an approximate part by weightbasis' 45 parts of an alkyd resin having an acid iiumbeuofffrom'm to 50 and a water content of about 1.5%,. 30partspolypropylene glycol having an average molecularfweight of. about 400, 2 parts aluminum stearate powder, 5 parts cyclohexyl levulinate, 1 part sodium 2, ethylhexyl derivative of tripolyphosphoric acid, and. 22 'parts, of meta-toluene diisocyanate containing 6 parts per parts of the diisocyanate of ethyl cellulose having a .viscosity oifrom 50 to 200 centipoises and an ethoxyl content offrorn 45 to 49.5%.

I2. The resilient cellular reaction product of a foaming composition comprising on an approximate part by weight basis 45 parts of an alkyd resin having an acid number o from to 50 and a water content of about 1.5%, 30 parts polypropylene glycol having an average molecular weight of, about 400, 2 partsaluminum stearate powder, Sparts'methyl'abietate, 1 part sodium 2, ethylhexyl derivative .of tripolyphosphoric acid, and 22 parts of metaltolueneldiisocyanate containing 6 parts per 100 parts of the diisocyanate of ethyl cellulose having a viscosity of from. 50 to. 200 and an ethoxyl content of from 45 to 49.5%.

' 13. The resilient cellular reaction product of a foaming composition comprising on an approximate part by weight basis 45 parts of a polyester resin having an acid number'ofi from 10 to 50 and a water content of about 1.5%, 30 parts polyethylene glycol having an average molecular weight. of 800, 2 parts aluminum stearate, 5 parts cyclohexyl levulinate, lpart sodium 2, ethylhexyl derivative oftripolyphosphoric acid, and 22 parts of meta-toluene diisocyanate containing 6 parts ethyl cellulose per each 100 partsof the diisocyanate, theethyl cellulose having a viscosity of'from 50 to 200 centipoises and an ethoxyl', content of from 45 to 45.9%. H -14. The resilient cellularre'action product of a foaming composition comprising on all-approximate part by weight basis 45 partsof a polyester resin having an acid number of-from 10 to 50 and a water content of about -1.5 30 parts polypropylene glycol. having an average molecular weight ofabout400, 2 parts. aluminum stearate powder, 5 parts cyclohexyllevulinate, lpart-sodium- 2, ethylhexyl derivative of tripely phosphoric'acid, and 25 partsof meta-toluene diisocyanate containing 6 parts per .100 parts ofthe diisocyanate'of ethyl cellulose having a viscosity of from, '50. to 200 centipoises and an ethoxyl content offiiomi 45 to.49.5%.

15. The re'silientcellular. reaction product of a foam ing composition comprising on an approximate part by weight basis-45 parts of a polyester resinhaving an acid number of from 10 to '50 and a water content of about 1.5%, 30 parts polypropylene glycol having an average molecular weight of about 400, 2'parts aluminum stearate powder, 5 parts cyclohexyl levulinate, 1 part sodium 2, ethylhexyl derivative of tripoly phosphoric acid, from a fraction of one part to 10 parts carbon black, and 22 parts of metaftoluene diisocyanatecontaining 6-parts per 100 parts of the diisocyanate of ethyl cellulose having a viscosity (of. from 5.0 to 200 centipoises and an ethoxyl content of frorn45 to 49.5%. I

16'. The resilient cellular reaction product of a foaming composition comprising on an approximate part by weight basis 45 parts of a polyester resin having an acid number of from 10 to 50 and a water content of about 1.5%, 30 parts'polypropylene glycol having an average molecular weight of about 400, 2 parts aluminum stearate powder, 5 parts methyl abietate, '1' part sodium 2, ethylhexyl derivative of tripoly' phosphoric acid, from a fraction of one part-to 10 parts pigment, and 22 parts of meta-toluene diisocyanate containing 6 parts per 100 parts of the diisocyanate of ethyl cellulose having a viscosity ofv from, 5.0 to 200 and an-ethoxyl content of from 45110 45.9%.

17. The yielding cellular reaction product, on an approximate part by weight basis, of 45 parts of an alkyd resin having an acid number of from 10 to 50 and a water content of about 1.5 30 parts polypropylene glycol having an average molecular weight of about 400, 2 parts aluminum stearate, 5 parts methyl abietate, and 22 parts meta-toluene-diisocyanate containing about 6 parts ethyl cellulose per each 100 parts of the metatoluene diisocyanate, the ethyl cellulose having a viscosity of from 50 to 200 and an ethoxyl content of from 45 to 49.5%.

18. The yielding cellular reaction product, on an approximate part by weight basis, of 45 parts of an alkyd resin having an acid number of from 10 to 50 and a water content of about 1.5%, parts polypropylene glycol having an average molecular weight of about 400, 2 parts of a metallic soap powder of a fatty acid having from 12 to 20 carbon atoms, 5 parts methyl abietate, and 22 parts of meta-toluene diisocyanate containing 6 parts per each 100 parts of the diisocyanate of ethyl cellulose having a viscosity of from 50 to 200 and an ethoxyl content of 20 from to 49.5%.

19. The yielding cellular reaction product, on an approximate part by weight basis, of 45 parts of an alkyd resin having an acid number of from 10 to and a water content of about 1.5%, 30 parts polypropylene glycol having an average molecular weight of about 400, 5 parts methyl abietate, and 22 parts meta-toluene diisocyanate containing about 6 parts ethyl cellulose per each parts of the meta-to1uene diisocyanate, the ethyl cellulose having a viscosity of from 50 to 200 and an ethoxyl content of from 45 to 49.5

References Cited in the file of this patent UNITED STATES PATENTS 2,284,896 Hanford et al. June 2, 1942 2,577,281 Simon et al. Dec. 4, 1951 2,591,884 Simon et al. Apr. 8, 1952 2,602,783 Simon et al. July 8, 1952 2,729,618 Muller et al. Ian. 3, 1956 OTHER REFERENCES Plastics (London), vol. 11, pages 257-262, May 1947.

Bayer: Rubber Chem. and Tech., Oct.-Dec. 1950 (vol. 23, No. 4, pages 823 and 826).

Del Bell et al.: German Plastics Practice, 1946, pages 231, 303, 311, 313, 463-465. 

1. THE YIELDING RESILIENT CELLULAR WHICH IS THE PRODUCT OF REACTION OF A FOAMING COMPOSITION COMRPISING ON AN APPROXIMATE PART BY WEIGHT BASIS 100 PARTS OF AN ALKYD RESIN HAVING AN ACID NUMBER OF FROM 10 TO 50 AND HAVING A FUNCTIONALITY RATIO OF FROM 3 TO 11/2 OH GROUPS TO 1 COOH GROUP, FROM 20 TO 130 PARTS OF A POLYGLYCOL REACTIVE PLASTICIZER HAVING AN AVERAGE MOLECULAR WEIGHT OF FROM 200 TO 2000 SELECTED FROM THE GROUP CONSISTING OF POLYETHYLENE GLYCOL AND POLYPROPYLENE GLYCOL, FROM 2 TO 20 PARTS OF AN INACTIVE ESTER PLASTICIZER SELECTED FROM THE GROUP CONSISTING OF CYCLOHEXYL LEVULINATE, METHYL ABIETATE, DIHYDROMETHYL ABIETATE, DIOCTYL SUCCINATE, DI (2ETHYL HEXYL) ADIPATE, DIBUTYL PHTHALATE, TRI (2-ETHYL HEXYL) PHOSPHATE, TRIETHYLENE GLYCOL DI (2-ETHYL BUTYRATE). TRIETHYLENE GLYCOL DI (2-ETHYL HEXOATE) AND DI (N-HEXYL PHTHALATE), AND FROM 30 TO 100 PARTS META-TOLUENE DIISOCYANATE CONTAINING FROM A FRACTION OF ONE PART TO 15 PARTS OF A HIGH MOLECULAR WEIGHT THERMOPLASTIC RESIN ADDITIVE SOLUBLE IN THE META TOLUENE DIISOCYANATE AND SELECTED FROM THE GROUP CONSISTING OF EHTYL CELLULOSE, CHLORINATED RUBBER, BENZYL CELLULOSE, NATURAL RUBBER, VINYL CHLORIDE-VINYL ACETATE COPOLYMERS, POLYVINYL CHLORIDE, POLYVINYL ACETATE, POLYSTYRENE AND POLYDICHLOROSTYRENE. 